ABAP Select data from SAP table J_1GVL_COVP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1GVL_COVP table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to J_1GVL_COVP. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the J_1GVL_COVP table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_J_1GVL_COVP TYPE STANDARD TABLE OF J_1GVL_COVP,
      WA_J_1GVL_COVP TYPE J_1GVL_COVP,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <J_1GVL_COVP> TYPE J_1GVL_COVP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1GVL_COVP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1GVL_COVP
  INTO TABLE IT_J_1GVL_COVP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1GVL_COVP
*  INTO TABLE @DATA(IT_J_1GVL_COVP2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_J_1GVL_COVP INDEX 1 INTO DATA(WA_J_1GVL_COVP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1GVL_COVP ASSIGNING <J_1GVL_COVP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1GVL_COVP>-MANDT = 1.
<J_1GVL_COVP>-KOKRS = 1.
<J_1GVL_COVP>-BELNR = 1.
<J_1GVL_COVP>-BUZEI = 1.
<J_1GVL_COVP>-AUFNR = 1.

ENDLOOP.

LOOP AT IT_J_1GVL_COVP INTO WA_J_1GVL_COVP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1GVL_COVP-POSNR, sy-vline,
  WA_J_1GVL_COVP-GJAHR, sy-vline,
  WA_J_1GVL_COVP-VERSN, sy-vline,
  WA_J_1GVL_COVP-BLDAT, sy-vline,
  WA_J_1GVL_COVP-BUDAT, sy-vline,
  WA_J_1GVL_COVP-WSDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1GVL_COVP you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_J_1GVL_COVP TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_J_1GVL_COVP INTO WA_J_1GVL_COVP.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFBN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-REFBN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-REFBN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWREF_REV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-AWREF_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-AWREF_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WTGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-WTGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-WTGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-WOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-WOGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-WKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-WKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-WRTTP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-SCOPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-PROJN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field REFGJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_1GVL_COVP-REFGJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1GVL_COVP-REFGJ.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_1GVL_COVP_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
GJAHR TYPE STRING,
VERSN TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
WSDAT TYPE STRING,
USNAM TYPE STRING,
STOKZ TYPE STRING,
REFBT TYPE STRING,
REFBN TYPE STRING,
REFBK TYPE STRING,
BLART TYPE STRING,
ORGVG TYPE STRING,
KWAER TYPE STRING,
AWTYP TYPE STRING,
AWORG TYPE STRING,
CPUTM TYPE STRING,
AWREF_REV TYPE STRING,
AWORG_REV TYPE STRING,
PERIO TYPE STRING,
WTGBTR TYPE STRING,
WOGBTR TYPE STRING,
WKGBTR TYPE STRING,
OBJNR TYPE STRING,
WRTTP TYPE STRING,
KSTAR TYPE STRING,
USPOB TYPE STRING,
TWAER TYPE STRING,
OWAER TYPE STRING,
BUKRS TYPE STRING,
SCOPE TYPE STRING,
PROJN TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
MATNR TYPE STRING,
KNTTP TYPE STRING,
BWTAR TYPE STRING,
BWTTY TYPE STRING,
PWERK TYPE STRING,
LGORT TYPE STRING,
DWERK TYPE STRING,
DAUAT TYPE STRING,
CHARG TYPE STRING,
GSBER TYPE STRING,
PAROB TYPE STRING,
VRGNG TYPE STRING,
CPUDT TYPE STRING,
REFGJ TYPE STRING,
SERNR TYPE STRING,
DAUTY TYPE STRING,
CUOBJ TYPE STRING,
SERNP TYPE STRING,
PSMNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1GVL_COVP_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_J_1GVL_COVP_STR-MANDT sy-vline 
WA_J_1GVL_COVP_STR-KOKRS sy-vline 
WA_J_1GVL_COVP_STR-BELNR sy-vline 
WA_J_1GVL_COVP_STR-BUZEI sy-vline 
WA_J_1GVL_COVP_STR-AUFNR sy-vline 
WA_J_1GVL_COVP_STR-POSNR sy-vline 
WA_J_1GVL_COVP_STR-GJAHR sy-vline 
WA_J_1GVL_COVP_STR-VERSN sy-vline 
WA_J_1GVL_COVP_STR-BLDAT sy-vline 
WA_J_1GVL_COVP_STR-BUDAT sy-vline 
WA_J_1GVL_COVP_STR-WSDAT sy-vline 
WA_J_1GVL_COVP_STR-USNAM sy-vline 
WA_J_1GVL_COVP_STR-STOKZ sy-vline 
WA_J_1GVL_COVP_STR-REFBT sy-vline 
WA_J_1GVL_COVP_STR-REFBN sy-vline 
WA_J_1GVL_COVP_STR-REFBK sy-vline 
WA_J_1GVL_COVP_STR-BLART sy-vline 
WA_J_1GVL_COVP_STR-ORGVG sy-vline 
WA_J_1GVL_COVP_STR-KWAER sy-vline 
WA_J_1GVL_COVP_STR-AWTYP sy-vline 
WA_J_1GVL_COVP_STR-AWORG sy-vline 
WA_J_1GVL_COVP_STR-CPUTM sy-vline 
WA_J_1GVL_COVP_STR-AWREF_REV sy-vline 
WA_J_1GVL_COVP_STR-AWORG_REV sy-vline 
WA_J_1GVL_COVP_STR-PERIO sy-vline 
WA_J_1GVL_COVP_STR-WTGBTR sy-vline 
WA_J_1GVL_COVP_STR-WOGBTR sy-vline 
WA_J_1GVL_COVP_STR-WKGBTR sy-vline 
WA_J_1GVL_COVP_STR-OBJNR sy-vline 
WA_J_1GVL_COVP_STR-WRTTP sy-vline 
WA_J_1GVL_COVP_STR-KSTAR sy-vline 
WA_J_1GVL_COVP_STR-USPOB sy-vline 
WA_J_1GVL_COVP_STR-TWAER sy-vline 
WA_J_1GVL_COVP_STR-OWAER sy-vline 
WA_J_1GVL_COVP_STR-BUKRS sy-vline 
WA_J_1GVL_COVP_STR-SCOPE sy-vline 
WA_J_1GVL_COVP_STR-PROJN sy-vline 
WA_J_1GVL_COVP_STR-KDAUF sy-vline 
WA_J_1GVL_COVP_STR-KDPOS sy-vline 
WA_J_1GVL_COVP_STR-MATNR sy-vline 
WA_J_1GVL_COVP_STR-KNTTP sy-vline 
WA_J_1GVL_COVP_STR-BWTAR sy-vline 
WA_J_1GVL_COVP_STR-BWTTY sy-vline 
WA_J_1GVL_COVP_STR-PWERK sy-vline 
WA_J_1GVL_COVP_STR-LGORT sy-vline 
WA_J_1GVL_COVP_STR-DWERK sy-vline 
WA_J_1GVL_COVP_STR-DAUAT sy-vline 
WA_J_1GVL_COVP_STR-CHARG sy-vline 
WA_J_1GVL_COVP_STR-GSBER sy-vline 
WA_J_1GVL_COVP_STR-PAROB sy-vline 
WA_J_1GVL_COVP_STR-VRGNG sy-vline 
WA_J_1GVL_COVP_STR-CPUDT sy-vline 
WA_J_1GVL_COVP_STR-REFGJ sy-vline 
WA_J_1GVL_COVP_STR-SERNR sy-vline 
WA_J_1GVL_COVP_STR-DAUTY sy-vline 
WA_J_1GVL_COVP_STR-CUOBJ sy-vline 
WA_J_1GVL_COVP_STR-SERNP sy-vline 
WA_J_1GVL_COVP_STR-PSMNG sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.